You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="FestaDeEnsemble|4" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="メインページ" />
      <page pageid="4" ns="0" title="白雲楼道中膝栗毛" />
      <page pageid="110" ns="0" title="雨降って、痔固まる" />
      <page pageid="154" ns="0" title="萌えバンド" />
      <page pageid="158" ns="0" title="ハマー" />
      <page pageid="184" ns="0" title="Kurigewikiの最期" />
      <page pageid="244" ns="0" title="Kazki to アンサンブルナイト" />
    </pages>
  </query>
</api>